Someone had put sugar in my gas tank and so i got it cleaned by a mechanic and it was doing great until i happen to start it wen i have been driving it for a few days and now it wont start? is it the fuel filter? or what?

Not sure if your mechanic actually flush the gas tank. It would be adviseable to flush the fuel tank. It is easy. If your car is using electrical fuel system, all you need to do is to remove one porting from the fuel line towrads the engine and turn on the ignition without starting the engine. The fuel system will flow out and will dry your fuel tank. But carefully with no accident on fire. Then top up about two gallon of fuel in the tank until you are sure that the tank is clean. And at the engine side also do the same thing.

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Sugar has been dismissed as a vandalism method for cars. There is no affect to the engine. It just sits in the tank and the fuel system is protected by a screen. So the issue that you are having has nothing to do with the sugar. Take it back to the mechanic and tell them to fix it because they probably did something.

First off it is a myth that sugar will destroy an engine. Sugar will not dissolve in gasoline. Depending on how much sugar was added it could clog the fuel pump sock filter. You have drained the tank, so add 5 gallons of fuel to the tank and start the engine. It will do no harm whatsoever. You may have to change the fuel filter a few times if the sugar clogs it but otherwise no harm will be done.

Quite honestly, I would make a claim on your insurance and take it to a garage. If it was in your yard and you have home owner's it may be covered there to. That is a nasty act of vandilism to do to anyone. Have you tried pouring dry gas with isopropyl into your gas tank? I was told it can help nuetralize the sugar.

please tell me you have not been driving around after finding sugar in the tank,cos if you have, and the sugar has gone right through the system, it is going to cost you thousands......new tank/new fuel lines.new carb or injectors,even pistons and valves.....(what happens when you put sugar on a spoon and heat it.....)ive got to say it, HOW STUPID.

if it still starts then your ok.remove gas tank and dump fuel.clean out any sugar on bottom of tank.go throuh the fuel pump hole. use a water hose if needed then let it dry.fill up tank and just run it it will be ok. what sugar does to an engine [and never mind myth busters, they are wrong] ive seen it 4 times, someone in town was having fun with sugar in the tank.anyways with enough sugar in gas tank the sugar disolves in the fuel.then engine,especially the valve stems get hot and sugar becomes a molten goo on the parts,valves,pistons,cylinders,fuel injectors.only the hot parts seem to be effected. then when you turn the engine off the sugar cools and becomes hard like a piece of hard candie.the valve stems are now locked into valve guides and cannot open or close,it takes alot more driving to damage pistons and rings only a little sugar is injected on every intake stroke and its aimed right at the valve stem.one mile of driving i dought will cause problems. beware that if the sugar was poured it dry you will need to flush out the filler neck.if it was dry then very little got in the tank anyway,unless you put gas in it after sugar was added

If it was done to you, DO NOT start the engine. You will ruin it. You need to remove the tank and fuel lines, fuel pump, the complete fuel system and clean it out to remove all traces of the sugar.
If you are thinking about doing it to someone else, it's NOT FUNNY. It can be extremely expensive to repair and has the potential to cause serious repercussions including possible criminal charges. Depending on where you live it could be classed as assualt.
Hope this helps.

It is a myth that sugar will mess your car up. Sugar does not dissolve in gas, it will just sit in the bottom of the gas tank. You will need to drop the tank and have it cleaned, and replace the in-tank fuel filter, but anything upstream of the fuel filter will be okay.

The only thing i can tell you is to get all the gas you can out of the tank, even if it means droping the tank. Then blow out the fuel line, install new filter, fill up with new gas with a fuel additive that cleans injectors and run it. I believe the worst that can happen is clog up the injectors, witch may not happen if you just run it. Depending on how much sugar was put in it.